Regulating environmental outcomes without stipulating the technologies to accomplish them is a characteristically American form of governmental intervention. This approach aims to encourage industry to address public-policy concerns while minimizing interference in its affairs. However, California's zero-emission-vehicle mandate of 1990 implied the development of specific technologies with highly disruptive sociotechnical effects. The most practical zero-emission vehicle of the day was the all-battery electric vehicle, a technology characterized by the temporal mismatch of its components. Batteries have shorter life-spans than electric motors, a durability dilemma that rewards battery-making. In response, General Motors and Toyota devised strategies to mitigate this risk that involved mediating the technology of the Ovonic Battery Company.